题目内容
脱式计算(能简便算的要简便算)
| (1)1.01+1.01×99 | (2)1.25×7.85×0.8 |
| (3)25×32×1.25 | (4)10.1×101 |
(1)1.01+1.01×99,
=1.01×(1+99),
=1.01×100,
=101;
(2)1.25×7.85×0.8,
=1.25×0.8×7.85,
=1×7.85,
=7.85;
(3)25×32×1.25,
=25×4×8×1.25,
=(25×4)×(8×1.25),
=100×10,
=1000;
(4)10.1×101,
=10.1×(100+1),
=10.1×100+1.01×1,
=1010+10.1,
=1020.1.
=1.01×(1+99),
=1.01×100,
=101;
(2)1.25×7.85×0.8,
=1.25×0.8×7.85,
=1×7.85,
=7.85;
(3)25×32×1.25,
=25×4×8×1.25,
=(25×4)×(8×1.25),
=100×10,
=1000;
(4)10.1×101,
=10.1×(100+1),
=10.1×100+1.01×1,
=1010+10.1,
=1020.1.
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